Specifically, this code enables you to pass a string from C# into C++ managed code and then get a C++ pointer to the string's chars.
[Marshal.StringToHGlobalAnsi Method](http://msdn.microsoft.com/en-us/library/system.runtime.interopservices.marshal.stringtohglobalansi.aspx) from MSDN.
Good [information about native vs. managed types](http://blog.rednael.com/2008/08/29/MarshallingUsingNativeDLLsInNET.aspx).
Related [forum post](http://social.msdn.microsoft.com/Forums/en-US/vcgeneral/thread/5fe46030-76f7-4988-9ce3-fc21a30ee3a2/).
[Marshal.StringToHGlobalAnsi Method](http://msdn.microsoft.com/en-us/library/system.runtime.interopservices.marshal.stringtohglobalansi.aspx) from MSDN.
Good [information about native vs. managed types](http://blog.rednael.com/2008/08/29/MarshallingUsingNativeDLLsInNET.aspx).
Related [forum post](http://social.msdn.microsoft.com/Forums/en-US/vcgeneral/thread/5fe46030-76f7-4988-9ce3-fc21a30ee3a2/).
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